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Item #:
5539175
Tjernlund BD-4 Spring Return Backdraft Damper for 4" Ducts
Item #:
5539175
NZD 22
Price Details
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In stock
Imported from USA store
QTY:
Order now and get it around Monday, July 20
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Galvanized steel, spring loaded dampers prevent back drafts with a tight seal and easy installation.
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What Stands Out
Automatic Operation
The BD-4 features a spring return mechanism that automatically seals the duct when not in use, preventing backdrafts and optimizing airflow efficiency in residential and commercial spaces.
Compact Design
Designed for 4-inch ducts, the BD-4's slim profile allows for easy installation in tight spaces, making it a versatile solution for various HVAC applications without compromising performance.
Durable Construction
Crafted from high-quality materials, the BD-4 ensures long-lasting durability and reliable operation, providing excellent value and peace of mind over time compared to competitors in the market.
Product Details
| Item Weight | 1 lbs (450 grams) |
Who Should Buy?
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Homeowners
Ideal for homeowners needing to prevent backdrafts and ensure proper ventilation in their HVAC systems.
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HVAC Technicians
Excellent for HVAC professionals installing systems to enhance airflow efficiency and meet code requirements.
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Energy Savers
Suitable for those aiming to reduce energy loss by preventing unwanted airflow when systems are not in use.
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Large Duct Systems
Not suitable for larger duct systems as it is specifically designed for 4-inch diameter ducts only.
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Outdoors Installation
This product is intended for indoor use and may not withstand outdoor conditions or elements.
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High Pressure Systems
Ineffective for high-pressure ventilation systems that require specialized dampers to handle increased airflow.
Product Description
Tjernlund BD-4 Spring Return Backdraft Damper for 4" Ducts
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Customer Questions & Answers
-
Question:
What sizes are available for the backdraft damper?
Answer: The backdraft damper comes in sizes ranging from 4in to 16in. -
Question:
What material is used for the damper blades?
Answer: The damper blades are made of lightweight aluminum. -
Question:
Is installation difficult?
Answer: No, the backdraft damper is designed for easy installation.
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Naylz
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“Purchased a YAMATIC 3/4" Shaft Horizontal Pressure Washer Pump 3400 PSI 2.5 GPM as a replacement for my GC190 water blaster. Fits perfectly and works well. Easy transaction and reasonable delivery to New Zealand.”
6 June 2026 · via Trustpilot
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“great service, quick delivery and comunication”
2 June 2026 · via Trustpilot
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“First time using Ubuy. Simple to use, well packed and faster than expected delivery. Was about the only way to get this item I've been after for almost a year … thank you Ubuy!”
15 May 2026 · via Trustpilot
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“First time using Ubuy and very impressed. Items arrived from the USA super fast and are such a top-quality product. I will definitely be back to purchase again. Cannot recommend you highly enough for a hassle-free & efficient service. Thank you so much. I am one very happy customer.”
14 May 2026 · via Trustpilot
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23 April 2026 · via Trustpilot
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Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
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NZD 22
Order now and get it around Monday, July 20
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Secured transaction
Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.
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Features & Benefits
- Constructed with galvanized steel for durability.
- Features lightweight aluminum damper blades for efficient operation.
- Spring-loaded design ensures positive closure against interior gaskets.
- Available in a variety of sizes from 4in to 16in.
- Usable as a replacement part for duct booster fans.
- Easy installation for quick setup.